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arXiv · 1510.07002

Structure and magnetism in $\rm LaCoO_3$

D. P. Belanger·T. Keiber·F. Bridges·A. M. Durand·A. Mehta·H. Zheng·J. F. Mitchell·V. Borzenets
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Abstract

The temperature dependence of the hexagonal lattice parameter $c$ of single crystal $\rm LaCoO_3$ (LCO) with $H=0$ and $800$Oe, as well as LCO bulk powders with $H=0$, was measured using high-resolution x-ray scattering near the transition temperature $T_o\approx 35$K. The change of $c(T)$ is well characterized by a power law in $T-T_o$ for $T>T_o$ and by a temperature independent constant for $T<T_o$ when convoluted with a Gaussian function of width $8.5$K. This behavior is discussed in the context of the unusual magnetic behavior observed in LCO as well as recent generalized gradient approximation calculations.

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D. P. Belanger, T. Keiber, F. Bridges, A. M. Durand, A. Mehta, H. Zheng, J. F. Mitchell, V. Borzenets. 2015-10-23. Structure and magnetism in $\rm LaCoO_3$. https://doi.org/10.1088/0953-8984%2F28%2F2%2F025602

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